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Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T

M. Anselmino·M. Boglione·A. Prokudin·C. Turk
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Abstract

We consider the azimuthal and $P_T$ dependence of hadrons produced in unpolarized Semi-Inclusive Deep Inelastic Scattering (SIDIS) processes, within the factorized QCD parton model. It is shown that at small $P_T$ values, $P_T \lsim 1$ GeV/c, lowest order contributions, coupled to unintegrated (Transverse Momentum Dependent) quark distribution and fragmentation functions, describe all data. At larger $P_T$ values, $P_T \gsim 1$ GeV/c, the usual pQCD higher order collinear contributions dominate. Having explained the full $P_T$ range of available data, we give new detailed predictions concerning the azimuthal and $P_T$ dependence of hadrons which could be measured in ongoing or planned experiments by HERMES, COMPASS and JLab collaborations.

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M. Anselmino, M. Boglione, A. Prokudin, C. Turk. 2006-06-28. Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T. https://doi.org/10.1140/epja%2Fi2007-10003-9

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